Church of Our Saviour on the Spilled Blood, St Petersburg, Russia. As a ghost, I am looking for a castle to haunt. What about this one? I know it isn't technically a 'castle' but look at its magnificent size! I think it would still be splendid to haunt.
Church in just one of many abandoned Russian villages, scattered across huge Russia. People simply leave for cities where they can earn more, and thousands of Russian wooden architecture masterpieces, sometimes more than 200 years old, stay by their own.